A.C Fundamentals, Circuits And Circuit Theory Set 2

Both waves must have same frequency ✘ Both waves must have identical peak values ✘ Both waves must have zero value at the same time ✘ None of the above ✔

Average voltage ✘ r.m.s. voltage ✘ Peak voltage ✘ None of the above ✔

Unsymmetrical part of the wave form ✘ The quarter cycle ✘ The half cycle ✘ The whole cycle ✔

Increases with increase of inductance and decrease of resistance ✘ Increases with the increase of inductance and the increase of resistance ✘ Increases with the decrease of inductance and decrease of resistance ✘ Increases with decrease of inductance and increase of resistance ✔

Reactive power in a circuit ✘ The extent of neutralization of reactive power in a circuit ✘ A purely capacitive circuit's ability to pass current ✘ A purely capacitive circuit's ability to resist the flow of current ✔

Purely inductive circuit ✘ R-L circuit ✘ R-C circuit ✘ R-L-C circuit ✔

A line which represents the magnitude and phase of an alternating quantity ✘ A line representing the magnitude and direction of an alternating quantity ✘ A colored tag or band for distinction between different phases of a 3-phase supply ✘ An instrument used for measuring phases of an unbalanced 3-phase load ✔

Low ✘ Very low ✘ High ✘ Very high ✔

Reduce eddy current loss ✘ Increase heat radiation ✘ Make assembly cheap and easier ✘ Reduce circuit permeability ✔

Less than unity ✘ Unity ✘ Greater than unity ✘ Zero ✔